AIDS as an election issue

'Safe sex' stops the spread of the virus

The good news from San Francisco at
the end of 1987 is that "safe sex" works
and that the spread of AIDS has
almost halted among gay men there. But the latest research in the city into the effects of the virus is producing increasingly grim findings.

Astro-navigation goes artificial

High accuracy in navigation and positioning is now obtained not from fixed stars but fast moving satellites.
Navstar, a new satellite navigation system, is being readied to provide astonishing accuracies of a few
metres in "blind" navigation